I think I found the answer: Its no longer use a magnet. I guess the display sleep mechanism is in the hinge.
Try to close the lid and leave about 1cm before the top and bottom case meet together, it will turn off the display without fully close the lid.
Not an ideal way to sleep the display compared to magnet method, but at least you can still do it without fully close the lid. And at least this method should be cooler to the machine compared to fully close the lid.
Same question here. I also tried to drag around a magnet without success. I think Apple might have changed the sleep magnet mechanism. Maybe they no longer use the sleep magnet method for display sleep :(
Hope somebody can clarify this.
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